package com.visionet.waveletData.web.common.http;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.nio.charset.Charset;
import java.util.Map;
import java.util.Properties;
import java.util.Vector;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.visionet.waveletData.web.common.utilities.props.PropsKeys;
import com.visionet.waveletData.web.common.utilities.props.PropsUtil;

/**
 * 
 * @author 李晓健
 * @date 2013年10月23日 上午11:49:09
 */
public class HttpRequester {
	private static Logger logger = LoggerFactory.getLogger(HttpRequester.class);
	
	private String defaultContentEncoding;

	public HttpRequester() {
		this.defaultContentEncoding = Charset.defaultCharset().name();
	}

	/**
	 * 发送GET请求
	 * 
	 * @param urlString
	 *            URL地址
	 * @return 响应对象
	 * @throws IOException
	 */
	public HttpRespons sendGet(String urlString) throws IOException {
		return this.send(urlString, "GET", null, null);
	}

	/**
	 * 发送GET请求
	 * 
	 * @param urlString
	 *            URL地址
	 * @param params
	 *            参数集合
	 * @return 响应对象
	 * @throws IOException
	 */
	public HttpRespons sendGet(String urlString, Map<String, String> params,boolean isUTF8)
			throws IOException {
		return this.send(urlString, "GET", params, null);
	}

	/**
	 * 发送GET请求
	 * 
	 * @param urlString
	 *            URL地址
	 * @param params
	 *            参数集合
	 * @param propertys
	 *            请求属性
	 * @return 响应对象
	 * @throws IOException
	 */
	public HttpRespons sendGet(String urlString, Map<String, String> params,
			Map<String, String> propertys,boolean isUTF8) throws IOException {
		return this.send(urlString, "GET", params, propertys);
	}

	/**
	 * 发送POST请求
	 * 
	 * @param urlString
	 *            URL地址
	 * @return 响应对象
	 * @throws IOException
	 */
//	public HttpRespons sendPost(String urlString) throws IOException {
//		return this.send(urlString, "POST", null, null);
//	}

	/**
	 * 发送POST请求
	 * 
	 * @param urlString
	 *            URL地址
	 * @param params
	 *            参数集合
	 * @return 响应对象
	 * @throws IOException
	 */
//	public HttpRespons sendPost(String urlString, Map<String, String> params,boolean isUTF8)
//			throws IOException {
//		return this.send(urlString, "POST", params, null);
//	}

	/**
	 * 发送POST请求
	 * 
	 * @param urlString
	 *            URL地址
	 * @param params
	 *            参数集合
	 * @param propertys
	 *            请求属性
	 * @return 响应对象
	 * @throws IOException
	 */
//	public HttpRespons sendPost(String urlString, Map<String, String> params,
//			Map<String, String> propertys,boolean isUTF8) throws IOException {
//		return this.send(urlString, "POST", params, propertys);
//	}

	/**
	 * 发送HTTP请求
	 * 
	 * @param urlString
	 * @return 响映对象
	 * @throws IOException
	 */
	private HttpRespons send(String urlString, String method, Map<String, String> parameters, Map<String, String> propertys)
			throws IOException {
		
		HttpURLConnection urlConnection = null;
		logger.debug("HttpRequester urlString:"+urlString+"   "+method);
		try {
			if (method.equalsIgnoreCase("GET") && parameters != null) {
				StringBuffer param = new StringBuffer();
				int i = 0;
				for (Map.Entry<String,String> entry : parameters.entrySet()) {
					if (i == 0)
						param.append("?");
					else
						param.append("&");
					param.append(entry.getKey()).append("=").append(entry.getValue());
					i++;
				}
				urlString += param;
			}
			
			//for HTTP Proxies 
			if(CheckProduction()){
				Properties systemProperties = System.getProperties();
				systemProperties.setProperty("proxySet", "true");
				systemProperties.setProperty("proxyHost",PropsUtil.getProperty(PropsKeys.HTTP_PROXYHOST));
				systemProperties.setProperty("proxyPort",PropsUtil.getProperty(PropsKeys.HTTP_PROXYPORT));
			}
			
			URL url = new URL(urlString);
			urlConnection = (HttpURLConnection) url.openConnection();
			
			urlConnection.setRequestMethod(method);
			urlConnection.setDoOutput(true);
			urlConnection.setDoInput(true);
			urlConnection.setUseCaches(false);
			
			if (propertys != null)
				for (Map.Entry<String,String> entry : propertys.entrySet()) {
					urlConnection.addRequestProperty(entry.getKey(), entry.getValue());
				}
	
			if (method.equalsIgnoreCase("POST") && parameters != null) {
				StringBuffer param = new StringBuffer();
				for (Map.Entry<String,String> entry : parameters.entrySet()) {
					param.append("&");
					param.append(entry.getKey()).append("=").append(entry.getValue());
				}
				urlConnection.getOutputStream().write(param.toString().getBytes());
				urlConnection.getOutputStream().flush();
				urlConnection.getOutputStream().close();
			}

			return this.makeContent(urlString, urlConnection);
		} catch (IOException ie) {
			logger.error("HttpRequester send error: ",ie);
			throw ie;
		} finally{
			if (urlConnection != null){
				try {
					urlConnection.disconnect();
				} catch (Exception e2) {
					logger.error(e2.toString());
				}
			}
		}
		
	}

	/**
	 * 得到响应对象
	 * 
	 * @param urlConnection
	 * @return 响应对象
	 * @throws IOException
	 */
	private HttpRespons makeContent(String urlString,HttpURLConnection urlConnection) throws IOException {
		HttpRespons httpResponser = new HttpRespons();
		try {
			InputStream in = urlConnection.getInputStream();
			BufferedReader bufferedReader = null;
			bufferedReader = new BufferedReader(new InputStreamReader(in,defaultContentEncoding));
			httpResponser.contentCollection = new Vector<String>();
			StringBuffer temp = new StringBuffer();
			String line = bufferedReader.readLine();
			while (line != null) {
				httpResponser.contentCollection.add(line);
				temp.append(line).append("\r\n");
				line = bufferedReader.readLine();
			}
			bufferedReader.close();

			String ecod = urlConnection.getContentEncoding();
			if (ecod == null)
				ecod = defaultContentEncoding;

			httpResponser.urlString = urlString;

			httpResponser.defaultPort = urlConnection.getURL().getDefaultPort();
			httpResponser.file = urlConnection.getURL().getFile();
			httpResponser.host = urlConnection.getURL().getHost();
			httpResponser.path = urlConnection.getURL().getPath();
			httpResponser.port = urlConnection.getURL().getPort();
			httpResponser.protocol = urlConnection.getURL().getProtocol();
			httpResponser.query = urlConnection.getURL().getQuery();
			httpResponser.ref = urlConnection.getURL().getRef();
			httpResponser.userInfo = urlConnection.getURL().getUserInfo();
			httpResponser.content = temp.toString();
			httpResponser.contentEncoding = ecod;
			httpResponser.code = urlConnection.getResponseCode();
			httpResponser.message = urlConnection.getResponseMessage();
			httpResponser.contentType = urlConnection.getContentType();
			httpResponser.method = urlConnection.getRequestMethod();
			httpResponser.connectTimeout = urlConnection.getConnectTimeout();
			httpResponser.readTimeout = urlConnection.getReadTimeout();

			return httpResponser;
		} catch (IOException e) {
			throw e;
		} finally {
			
		}
	}

	/**
	 * 默认的响应字符集
	 */
	public String getDefaultContentEncoding() {
		return this.defaultContentEncoding;
	}

	/**
	 * 设置默认的响应字符集
	 */
	public void setDefaultContentEncoding(String defaultContentEncoding) {
		this.defaultContentEncoding = defaultContentEncoding;
	}
	
	public static boolean CheckProduction(){
		String domain = PropsUtil.getProperty(PropsKeys.SERVICE_DOMAIN);
		if(domain!=null && domain.indexOf("dxtxq.cn")!=-1){
			return true;
		}
		return false;
	}
}
